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| author |  Héctor Ramón Jiménez <hector0193@gmail.com> | 2020-05-01 05:42:07 +0200 |
|---|---|---|
| committer | Héctor Ramón Jiménez <hector0193@gmail.com> | 2020-05-01 05:42:07 +0200 |
| commit | ffbe59f8129c80afb3e86eae67efaa5370fbfa8e (patch) | |
| tree | 93f11093d42907b73d80ad03326406067be03574 /examples/game_of_life | |
| parent | 0a5f1bb676f89a26711a8885935ffe94a370c261 (diff) | |
| download | iced-ffbe59f8129c80afb3e86eae67efaa5370fbfa8e.tar.gz iced-ffbe59f8129c80afb3e86eae67efaa5370fbfa8e.tar.bz2 iced-ffbe59f8129c80afb3e86eae67efaa5370fbfa8e.zip | |
Zoom to cursor in `game_of_life` example
Diffstat (limited to 'examples/game_of_life')
| -rw-r--r-- | examples/game_of_life/src/main.rs | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/examples/game_of_life/src/main.rs b/examples/game_of_life/src/main.rs index 92500309..c818d99f 100644 --- a/examples/game_of_life/src/main.rs +++ b/examples/game_of_life/src/main.rs @@ -292,7 +292,21 @@ mod grid { if y < 0.0 && self.scaling > Self::MIN_SCALING || y > 0.0 && self.scaling < Self::MAX_SCALING { - self.scaling = (self.scaling + y / 30.0) + let factor = y / 30.0; + + if let Some(cursor_to_center) = + cursor.position_from(bounds.center()) + { + self.translation = self.translation + - Vector::new( + cursor_to_center.x * factor + / (self.scaling * self.scaling), + cursor_to_center.y * factor + / (self.scaling * self.scaling), + ); + } + + self.scaling = (self.scaling + factor) .max(Self::MIN_SCALING) .min(Self::MAX_SCALING); |